Groups > comp.lang.java.programmer > #20012

Re: How convert Iterator into Enumeration

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From	Jim Janney <jjanney@shell.xmission.com>
Newsgroups	comp.lang.java.programmer
Subject	Re: How convert Iterator into Enumeration
Date	Wed, 28 Nov 2012 14:01:21 -0700
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Roedy Green <see_website@mindprod.com.invalid> writes:

> On Wed, 28 Nov 2012 11:11:47 -0700, Jim Janney
> <jjanney@shell.xmission.com> wrote, quoted or indirectly quoted
> someone who said :
>
>>enumeration method in java.util.Collections.
>
> Are you referring to?
> static <T> Enumeration<T> enumeration(Collection<T> c)
>
> I don't see one that takes an Iterator.

Yes, and yes.  Not as general as adapting an Iterator, but good enough
for the problem as originally described, which was to produce an
Enumeration from a HashMap.  Assuming that parametermap is declared as

    Map<String, Object> parametermap;

you can write

    /**
     * <p>Retrieve the parameter names.</p>
     *
     * @return The names.
     */
    public Enumeration<String> getParameterNames() {
        return java.util.Collections.enumeration(parametermap.keyset());
    }

-- 
Jim Janney

Thread

How convert Iterator into Enumeration Jan Burse <janburse@fastmail.fm> - 2012-11-28 12:55 +0100
  Re: How convert Iterator into Enumeration Roedy Green <see_website@mindprod.com.invalid> - 2012-11-28 05:22 -0800
    Re: How convert Iterator into Enumeration Wanja Gayk <brixomatic@yahoo.com> - 2012-11-30 20:23 +0100
  Re: How convert Iterator into Enumeration Jim Janney <jjanney@shell.xmission.com> - 2012-11-28 08:53 -0700
    Re: How convert Iterator into Enumeration Jim Janney <jjanney@shell.xmission.com> - 2012-11-28 11:11 -0700
      Re: How convert Iterator into Enumeration Roedy Green <see_website@mindprod.com.invalid> - 2012-11-28 12:36 -0800
        Re: How convert Iterator into Enumeration Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-11-28 13:00 -0800
        Re: How convert Iterator into Enumeration Jim Janney <jjanney@shell.xmission.com> - 2012-11-28 14:01 -0700
    Re: How convert Iterator into Enumeration Roedy Green <see_website@mindprod.com.invalid> - 2012-11-28 12:38 -0800
  Re: How convert Iterator into Enumeration Eric Sosman <esosman@comcast-dot-net.invalid> - 2012-11-28 13:22 -0500
    Re: How convert Iterator into Enumeration Eric Sosman <esosman@comcast-dot-net.invalid> - 2012-11-28 13:28 -0500
      Re: How convert Iterator into Enumeration markspace <-@.> - 2012-11-28 13:10 -0800
      Re: How convert Iterator into Enumeration Daniele Futtorovic <da.futt.news@laposte-dot-net.invalid> - 2012-12-01 17:49 +0100

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